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In conjunction with the failed installation of an extension (yag), the install tool is no longer available with the following error message:

PHP Fatal error:  Class '\\tx_install_session' not found in /var/typo3_src-6.0.2/typo3/sysext/core/Classes/Utility/GeneralUtility.php on line 4158

Any suggestions are welcome.

Ok, I'm one step further.

Assuming the backend login works, it helps to clear the cache via the flash button.

Which leads me to the question: Is there a way to do this in the shell in case the BE login is broken?

Bill the Lizard
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Jens Piegsa
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1 Answers1

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Remove/comment the bad extension in the LocalConfiguration.php file and then remove content of /typo3temp/Cache/ directory.

It will allow you restore to the state before the malformed installation.

biesior
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